Cooking-stove



R. o. GRANGER.

Cooking Stove.

Patonte'd May4 18, 1858.

u Pmra moummpw. wzmingm u4 a UNITED STATES PATENT OFFICE.

R. D. GRANGER, OE PHILADELPHIA, PENNSYLVANIA.

COOKING-STOVE.

Specification of Letters Patent No. 20,265, dated May 18, 1858.

To all whom it may concern:

Be it known that I, RnNssnLAER D. GRANGER, of the city of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Cook ing-Stoves; and I do hereby declare the following to be a full, clear, and eXact description of the same, reference being had to the accompanying drawing and to the letters of reference marked thereon.

My invention consists in arranging an oven constructed of burnt fireclay, or other material capable of absorbing and retaining heat, with an ordinary cooking stove, in such a manner, that the products of combustion may be caused to pass either through the said oven, or around the same. In connection with the clay lining is an annular, perforated tube and air pipe, so constructed and arranged, that the unconsumed gases in the products of combustion shall be ignited before they pass into the interior of the oven. My invention has for `its aim, the production of a stove, which shall possess all the conveniences of any ordinary, cooking stove, combined with the well known advantages of a brick oven.

In order to enable others skilled in the art to make and use my invention, I will now proceed to describe its construction and operation.

On reference to the accompanying drawing, which forms a part of this speciHcation: Figure l is a sectional elevation of a cooking stove, illustrating my improvements in the same; Fig. 2 a sectional plan on the line l, 2, (Fig. l) with the top of the fire-place removed.

A is the lire-place of the stove, and a the usual grate.

B is the ash-pit, b the hearth, and c and o the usual doors for closing the front of the fireplace and ashpit, when necessary. The top plate d has openings for the reception of cooking utensils, as in ordinary cooking stoves.

At the front corner of the Hreplace is an angular projection e, consisting of two plates, the lower one of which is permanently attached to the stove, the upper plate being so hinged to the lower, that, by opening or closing it, the air may be admitted t0, or excluded from the fireplace.

D, D, D2 and D3 are the plates, which, together with the side plates E and E form the exterior casing of the oven, the upper plate D having the ordinary openings for cooking utensils, and being furnished With a pipe f, communicating with the chimney. The inner lining Gr of the oven is made of burnt or baked Hreclay, or of any other material capable of retaining heat for a length of time. This lining may be either made of one entire piece, or in detached pieces carefully fitted together, the opposite side plates E and E having Han es, which H ordinary sliding damper Ic, by operatingI which, the openings m m, which form a communication between the interior of the oven and the chimney, may be covered or exposed at pleasure. In the bottom of the lining and near the front corner of the same is fitted an annular tube M, the interior of which communicates, in one direction through the pipe N With the external atmosphere, and in another direction through a series of small holes with the interior of the oven when the cover plate p is removed.

The oven doors P and P are furnished with a lining of the same material as the inner casing of the oven.

When the oven has to be used for baking, the products of combustion are allowed to pass through the Hues H and K, past the open valves h and z', to the chimney, for some time after the Hre has been kindled. This partially heats the lining G, but, owing to the non-conducting nature of the material of which it is composed, not sufficiently for baking purposes. By removing the cover plate y), however, from the annular tube, sliding back the damper K, so as to expose the openings m m, and closing the valves h and z', the products of combustion pass through the opening formed by the annular tube M into the interior of the oven, where they circulate, prior to passing 0H' through the orifices m m to the chimney. The lining of the oven having thus become thoroughly heated, the cover plate p is replaced, and the oriices m m covered, when the oven is ready for the reception of the bread or other articles or diet. The subsequent passage of the products of combustion under and over the lining serves to retain the heat in the latter, during the process of baking.

The object of the air pipe N, as communieating with the annular tube M, and the perforations in the latter, is, that the jets of air may be brought in contact with the products of combustion, and thus ignite the unconsumed gases of the same, prior to their passage into the interior of the oven, or around the flues thereby increasing the heat, and preventing the accumulation of foul matter in the inside.

f It will now be seen, that the above described arrangement possesses all the con- Venience of an ordinary cooking stove, together with the advantages, (too well known to need description here) of an ordinary brick oven.

I claim and desire to secure by Letters Patent l. Combining an oven, constructed of burnt freclay, or other equivalent material capable of absorbing and Vretaining heat, with an ordinary cooking' stove, in such a manner, that the products of combustion may pass either around or through the interior of the oven, for the purpose specified.

' 2. The arrangement of the annular, perforated tube M and its air pipe N with the lining G; the same being arranged substantially as, and for the purposerh'erein set forth.

In testimony whereof, I have signed my name to this specific-ation before two sub- Witnesses HENRY I-IowsoN, HENRY 'ODIoRNn 

